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When people tell me they hate there ABS, alot of people who pull trailer do. I tell them just to pull the fuse this will stop them completely. Yeah theres a light ont he dash but that can alos be delt with by removing the bulb for it. But int he long run just pulling the fuse is quick and Free.

these trucks need a seperate bleed procedure for ABS you need a scanner to put it into this bleed mode,hope this helps if not get back to me and we'll go from there. please rate my fix as i strive to be the best

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I am not familiar with the car. Brake proportioning valve is usually positioned these days above or near the rear suspension.

Brake proportioning can be by g-valve, pressure limiting valve or most often these days by a load sensing limiting valve. The latter is connected to the rear suspension by a spring and/or an adjustable link. In some cases there are two valves; one each side for independent rear suspension.
The checking and adjustment of the linkage is generally part of the routine maintenance and is often maladjusted by ill-informed but well-meaning people.

I have seen the g-valve fitted on the front bulkhead by some manufacturers. In theory this type can be fitted almost anywhere.

Assuming you're talking about the brake system...
The proportioning valve is on the rear brakes only when the vehicle has rear Drum Brakes.
What it does is limits the brake line pressure to the rear brakes during normal stopping. This way the rear brakes don't lock up and cause the vehicle to fish tail or spin.
When you press the brakes harder than normal, the proportioning valve opens more to allow more line pressure so you're able to stop faster.

H Colin, The brake proportioning valve adjust the amount of effort required for maximum efficiency with different loads in the vehicle. The brakes in most vehicles are proportioned for approximately 60% front brakes and forty percent rear. The valve makes small adjustments to braking between front and rear. Regards john

All bleeding is done at each caliper and wheel cylinder. The proportioning valve has no bleeder. The proportioning valve makes the front brakes engage before the rears do to prevent the rear brakes from causing a sideways skid.

It is a brake load sensoing valve that applies more pressure to the rear brakes as you load the vehicle. It is $375 from tascafordparts.com. Get one from the junk yard or just bypass it.

usually just the lines are leaking and can be replaced.
Valve, Brake Load Sensor Proportioning
The Villager has a brake load sensor proportioning valve (2B547) that is mounted on the vehicle frame and connected to the rear axle housing (4010) .
When the vehicle is unloaded, the brake load sensor proportioning valve closes and partially reduces hydraulic pressure to the rear wheel cylinders (2261) . As the vehicle is loaded, the weight presses down the back end of the vehicle on the rear springs (5560) . This activates the brake load sensor proportioning valve which opens and supplies more hydraulic pressure to the rear wheel cylinders . When the vehicle is fully loaded, the brake load sensor proportioning valve is fully open and provides full hydraulic pressure to the rear wheel cylinders .
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The proportioning valve varies the pressure to each wheel, usually the back wheels, because more of your braking is done with the front wheels, than the rear wheels. So the proportioning valve restricts the pressure from the master cylinder, to the rear wheels.

Proportioning valve for the brakes? rear brakes? rear brakes are located on the rear end, for all brakes(front to rear proportion) is usually part of or under the master cylinder, and if either are bad then you need a new one, there is no resetting them

these trucks need a seperate bleed procedure for ABS you need a scanner to put it into this bleed mode,hope this helps if not get back to me and we'll go from there. please rate my fix as i strive to be the best